Valid Parentheses
Description
Given a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.
An input string is valid if:
Open brackets must be closed by the same type of brackets. Open brackets must be closed in the correct order. Every close bracket has a corresponding open bracket of the same type.
Example 1:
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Input: s = "()"
Output: true
Example 2:
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Input: s = "()[]{}"
Output: true
Example 3:
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Input: s = "(]"
Output: false
Example 4:
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Input: s = "([])"
Output: true
Constraints:
- 1 <= s.length <= 104
- s consists of parentheses only ‘()[]{}’.
Solutions